We observed the nearby (18 Mpc) Seyfert 2 galaxy NGC 6300
using RXTE. The 25 ks observation revealed a huge iron line
(1 keV equivalent width) and a flat spectrum (\Gamma
\approx 0.4). This result suggests that its X-ray spectrum
is dominated by Compton reflection. This interpretation,
while not unique, is supported by its low Lx/L[OIII])
ratio, evidence for reddening in the optical continuum and
emission lines, and the presence of a bar in the host
galaxy. If this interpretation is confirmed, NGC 6300 will
be an excellent object for further study, as it is about
half as bright between 2 and 10 keV as the brighest known
object in this class (Circinus), and far brighter than other
known examples. Furthermore, it is faint in soft X-rays,
probably indicating either that there is little
contamination of the Compton reflection spectrum by thermal
emission or scattering in warm gas, or that there is
intrinsic absorption in the host galaxy.